<![CDATA[Unit KMeter]]>Just got a Unit KMeter.
I've tried the examples which work perfectly.
But there doesn't seem to be a way to detect if the thermocouple is not connected. The last value is returned every time when I disconnect the thermocouple.

]]>https://community.m5stack.com/topic/3926/unit-kmeterRSS for NodeWed, 29 Apr 2026 08:41:39 GMTFri, 14 Jan 2022 13:05:54 GMT60<![CDATA[Reply to Unit KMeter on Fri, 25 Mar 2022 05:58:37 GMT]]>@tuckie nice work, I'm waiting on UIFlow blocks in order to make a project.

]]>https://community.m5stack.com/post/17017https://community.m5stack.com/post/17017Fri, 25 Mar 2022 05:58:37 GMT<![CDATA[Reply to Unit KMeter on Fri, 25 Mar 2022 02:48:42 GMT]]>Some updates:

I asked for a copy of the firmware, and they delivered!: https://github.com/m5stack/M5UnitKMeter_Firmware

  • Short to Ground/VCC status > turns out all 32 bits is actually sent over i2c, so this is fully accessible. I was able to combine the first 4 bytes and then use code from a standard MAX31855 library to parse out all the info. (I'm builiding out an ESPHome component)
  • Details about flashing firmware onto KMeter (note, I just soldered on a header and used platformio to flash the project as that was easier for me than figuring out the i2c transfer method that is also available)
  • Ability to set address > it looks like with the CMD_REG_ACCESS command, you can have it assign a new address (I may just flash a custom firmware rather than figuring this out)
]]>https://community.m5stack.com/post/17015https://community.m5stack.com/post/17015Fri, 25 Mar 2022 02:48:42 GMT<![CDATA[Reply to Unit KMeter on Sun, 06 Feb 2022 19:31:58 GMT]]>Also looking for:

  • Short to Ground/VCC status
  • Source Code for firmware
  • Details about flashing firmware onto KMeter
  • Ability to set address (a custom flash would be okay)
]]>https://community.m5stack.com/post/16547https://community.m5stack.com/post/16547Sun, 06 Feb 2022 19:31:58 GMT